Through example, shows that the accuracy of the assessment of language competence, performance, and dominance of the potentially bilingual student may be seriously impaired by inappropriate conditions of observation and lack of knowledge by the assessor. (TO)

Several external and internal factors combine to hinder optimal communication in "Competency," the language of behavior modification. As a language, Competency a) is spoken with varying degrees of fluency and facility, b) is difficult to translate into English because the common vocabulary is used descriptively in English while it is…